The world code is: 1810074053

Tested on v1.5.2

You spawn in a jungle biome with a large desert ahead.  In the distance there is an NPC village, we will start there.  The coordinates for this village are X: 55 Y: 105 Z: 166.  There is no blacksmith here but there are some nice desert mountains in the background.  In addition, visible from this location, there is a desert temple slightly sunk in the sand.  The coordinates for the temple are X: 26 Y: 74 Z: 297.

Near the spawn point a jungle and swamp biome intersect.  If you trace the path of intersection you will eventually come across a jungle temple at X: -362 Y: 69 Z: 118

There is a surface dungeon with an enchanted book in it at X: 156 Y: 69: Z: -63…this is very close to the second village which does have a blacksmith this time.  There is also a second desert temple at X: 360 Y: 73 Z: -149.

If you dig down vertically at X: 766 Z: -99 there is a stronghold below.  There is a zombie spawner in the stronghold and it is has the enchanted book fortune 3 in it. I found surface diamonds and emeralds surrounding the stronghold, so if you explore for a bit you will find them as well.

Seed Name (cut and paste to avoid errors): -8042471896278289475

Tested on Minecraft 1.5.2

This Minecraft Seed spawns you in a plains biome with a half dozen cows nearby.  Also, next to the spawn point is a decent cave system which will make gathering some ores very easy at the start.  So grab some coal and iron ores and lets move on. (X: 11, Z: 133 for a dozen surface coal ores…torch time!)

There is a small NPC town at X: 83 Z: -154.  It comes complete with a blacksmith and several farm animals (cows, sheep) nearby.  It is in the plains with a jungle biome near.  There is a ravine really close to here at X: -15 Z: -232.  In a cave near the bottom of the crevice is an abandoned mineshaft and in there are several surface diamonds at X:  -1 Y: 14 Z: -165.  If you keep exploring you will find 2 more diamonds at X: 26 Y: 13 Z: -165

There is an absolutely ridiculous ravine that you MUST go check out.  Its double wide with a lava floor.  Surface diamonds all over the place and an abandoned mineshaft. X: -683 Y: 17 Z: -199.  There is a stronghold connected to the abandoned mineshaft, if you have the coordinates for it leave them in the comments.  Check out the video:

There is also a Jungle Temple (X: 878 Y: 78 Z: -384) and Desert Temple.